Nut-lock.



I 909. 922,543 Patented May 25, 1909.

,Fl G. 1-

UNITED SAMUEL TRUS'ION, OI MASSILLON, OHIO.

NUT-LOCK.

Specification of Letters Patent.

Patented May 25, 1909.

Application filed March 15, 1909. Serial No. 483,41-1.

To all whom it may concern):

Be it known that I, SAMUEL TnUs'roN, residing at Massillon, in the county of Stark and State of Ohio, a citizen of the United States, have invented or discovered certain new and useful Improvements in N ut- Locks, of which improvement the following is a specification.

The invention described herein relates to certain improvements in means for locking nuts as against a loosenin movement on bolts, and consists generally in a key or wedge engaging both the nut and bolt and provided with a surface at an angle to its axis and having a cutting edge in such relation to such surface thata portion of the metal of the nut or bolt will be forced by such edge against the surface,.thereby locking the wedge in position.

The invention is hereinafter more fully described and claimed.

' In the accompanying drawing forming a part of this specification Figure 1 is-a sectional elevation of a bolt and nut locked by my improved means; Fig. 2 is a transverse section through the nut and bolt; Figs. 3 and 4 are views similar to Figs. 1 and 2 showing the key or wed e in reverse position; Fig. 5 is a view simiIar to Fig. 1 illustrating a further modification of my improvement; Fig. 6 is a perspective view of the key or looking iece; and F ig. 7 is a plan view of a nut to w rich the lock has been applied showing the locking tongue.

In the practice of my invention the key or wedge l is refer-ably formed with a cutting ridge 2 a ong one side or edge and its opposite side or edge fiat, as clearly shown in Figs. 2 and 4. The shank of the key or wedge is gradually increased in thickness from the point to its head, so that it will have a wedging action when driven as hereinafter stated to lock the nut. The head 3 is made to overhang one of the edges preferably the flat edge opposite the cutting ridge 2, as shown in Figs. 1, 3 and 6, but the head may overhang the cutting ridge 2, as shown in. Fig. 5. A bearing or looking surface 4 is formed adjacent to the upper end of the shank and at an angle to its axis and referably immediately below the head 3.

he overhanging part of the head is provided with a cutting edge 5 arranged in such position relative to the locking surface 4, that a tongue of metal 6 which is formed by the cutting edge from the top of the nut or bolt, will be forced over against the locking surface and thereby securely fasten the key or wedge in position. the locking surface and the cutting edge 5, by cutting a groove 7 at the junction of the head and shank, said groove being at an acute angle to the axis of the shank.

In using my improved key it is forced in between the nut and bolt, so as to engage both. Its introduction may be facilitated by forming grooves for its reception. It is preferred to form a groove 8 in the nut of such depth relative to the thickness of the wedge, that the longitudinal cutting ridge 2 will be forced to a greater or less depth into the threads on the bolt. As shown in Figs. 3, 4

and 5 the groove for the introduction of the key or wedge may be formed in the bolt and the cutting ridge forced into the threads of the nut. 4 When driving the key down its cutting edge 5 will enter the nut or bolt and will force a tongue of metal 6 into the groove and over a ainst the locking surface 4, and thereby lock the wedge as against being accidentally loosened. The cutting ridge 2v will not so greatly injure the threads as to prevent the nut or bolt being again used.

It is preferred that the overhanging portion of the head on which the cutting edge 5 is formed should be made narrower than the groove in the nut or bolt, so as to facilitate the bending of the tongue of metal against the locking surface. As will be readily understood, if the cutting edge should be made of a width equal to or greater than the width of the groove, the edges of the tongue will have to be sheared or torn loose in order that the tongue may be bent in against the locking surface. Whereas by making the cutting edge narrower than the groove, the metal as 9 along the edges of the tongue will readily stretch and permit the inward movement of I the tongue, as shown in Fig. 7.

I claim herein as my invention: 1. A lock for nuts, consisting of a shank ortion constructed to engage the nut'and bolt, having a locking surface adjacent to its upper end and provided with a cutting edge suitably arranged with reference to the looking surface that a tongue of metal formed by the cutting edge from one of the parts to be gocked will be forced against the locking surace.

2. A look for nuts consisting of a shank portion constructed to engage the nut and )olt, and a head overhanging one edge of the It is preferred to form I shank, said parts having a groove cut therein adjacent to their junctlon, the groove being at an acute angle to the axis of the shank, thereb forming a locking surface and a cutting e ge.

3. A look for nuts consisting of a shank portion constructed to engage the nut and bolt, and a head overhanging one edge of the shank, said parts having a groove cut therein adjacent to their junction, the groove being at an acute angle to the axis of the shank, thereby forming a locking surface and a cutting ed c, said edge having a width less than the Wi th of the shank.

4. A look for nuts consisting of a tapering shank portion having a cutting ridge along one edge and having a head overhan the edge, the shank being provided'with a ocking surface at an angle to the axis of the shank and the head having a cutting edge arranged to form a tongue on one of the parts to be locked and force the said tongue against the locking surface.

In testimony whereof, I have hereunto set my hand.

SAMUEL TRUSTON.

' Witnesses:

SHIRLEY SOUTHWORTH, D. F. REINOEHL. 

